Syringe-hydrometer



R. A. AMERMAN.

SYRINGE HYDROMETER.

APPLICATION FILED A'uexzs, I916.

Patented Sept. 13, 1921.

1 fia /MAAmer/M/L, @644 W mfivcsss j UNITED STATES PATENT OFFICE.

RALPH A. AMERMAN, OF SCBAN'ION, PENNSYLVANIA, ASSIGNOR TO SCRANTON GLASS INSTRUMENT COMPANY, OF SCRAN'I'ON, PENNSYLVANIA, A CORPORA- 'I'ION 9F PENNSYLVANIA.

SYRINGE-HYDROMETER.

To all whom it may concern:

Be it known that I, RALPH A. A ERMAN, a citizen of the United States, residing at Scranton, in the county of Lackawanna and State of Pennsylvania, have invented new and useful Im rovements in Syringe-Hydrometers, of which the following is a specification. y v My invention relates to improvements in hydrometers-and has special reference to the type of instrument known as the syringe hydrometer commonly used for measuring which may the density of liquids in storage batteries he improvements relate more partlcularly to a construction whereby the hydromcter element or float may be maintained in an n right position in the float chamber regardlbss of its range of movement. It has been found by associating my improvement directly with the hydrometer element or float that a structure is obtained be easily and economically manufactured and affords a simple and advantageous operation.

y invention also contemplates the associatlon of a collar of rectangular or polygonal shape with the housing of the hydrometer so that when the housing is placed upon a flat surface, it will not roll away and be subject to breakage.

Other novel features of the invention tending in conjunction with the objects recited above, to provide an improved syringe hydrometer of simple structure, the graduated stem of which can be easily read, will ap ear as the description proceeds.

n the accompanying drawings a Figure 1 is a side elevation of the assembled syringe hydrometer.

Fig. 2 is a side elevation of the float or hydrometer element.

Fi 3 is a section on the line 3-3 of Fig. 2 looiing v showing the arrangement of the projections on the bulb of the hydrometer element.

Fig. 4 is a perspective view of the cork or closure for the lower end of the hydrometer housing.

Fig. 5 is a perspective view of the collar adapted to prevent the hydrometer housing from rolling away.

The numeral 10 designates the housing of t e synnge hydrometer which 1s reduced i Specification of Letters Patent.

in the direction of the arrows and Patented Sept. 13, 1921.

Application filed August 25, 1920. Serial m. masks.

diameter at one end as at 11 to form an extension adapted to be inserted within the reduced end of a collapsible bulb 12. The opposite end of the housing is preferably outwardly flared so as to form a flange 13 against which a collar 14 of rectangular or other polygonal shape is adapted to engage. The collar 14 is formed with a central aperture 14' and is placed over the cylindrical body portion of the housing 10 before the collapsible bulb is connected to extension 11. The hydrometer element or float is normally located within the body portion of the housing 10 which is preferably cylindrical and of uniform diameter. This float consists principally of the elongated bulb 15 which is reduced at its upper end and ex tende so as to form a stem 16, the latter being graduated in any suitable manner according to the varying densities'of the liquid to be tested. The base of thebulb 15 is rounded as at 16' and filled with shot 17 maintained loosely in position by proper sealing or retaining means indicated at 18. The bulb 15 is formed adjacent the rounded base portion 16 with integral projections 19 which are peripherally spaced about the bulb and preferably arranged at diametrically opposite points and extend outwardly to a distance approximately equal to the inner diameter of the housing 10. At the top of the bulb 15 near the stem portion a plurality of peripherally spaced integral projections 20 are also formed preferably at diametrically opposite points and in staggered relations to the projections 19. The projections 20 have about the same dimensions as the projections 19 whereby a plurality of contact polnts are formed so that the bulb and the stem extending therefrom are maintained in a central position with regard to the housing 10 and remain in symmetrical relation to the central vertical axis of said housing.

A cork 21 preferably of rubber having outwardly tapered sides forms a closure for the lower end of the housing 10. This cork or stopper is formed with a central aperture 22 adapted to receive one of the tapered ends of the nozzle piece 23. The cork 21 is formed on its inner surface with intersecting grooves 24, 25 of suflicient depth to perm1t the liquid to be tested to flow freely into the housing when the rounded base 6 o he hydrometer is resting on the upper surface of the stopper but out of contact with the bottom of the grooves.

In operation, the nozzle 23 is inserted through the opening in the storage battery or into the liquid to be tested and by means of the bulb 12 the liquid is drawn within the housing and the hydrometer will float there in at a certain level indicated by the graduations of the stem 16. Assumin that the housing is held vertically the pro ections 19 and 20 contact with the wall of the housing 10 and maintain the float in an upright position and centrally located throughout its length with relation to the housing. If the hydrometer is placed upon a flat surface, the collar 14 will prevent the same from rolling away and the projections 19, 20 will maintain the bulb in symmetrical position with regard to the major axis of the housing.

As described, the housing and hydrometer portion of uniform diameter having at one end a reduced extension and outwardly flared at the other end so as to form a flange, a collapsible bulb connected to said reduced extension, a polygonal collar bearing against said flange, a hydrometer element within the housing having means associated therewith for maintaining said element in symmetrical relation with the walls of said body portion and a closure for the opposite end of said housing having a nozzle mounted therein.

2. In a syringe hydrometer, the combination of a housing having a body portion of uniform diameter, a hydrometer element mounted in said body portion having a bulb with a stem extending therefrom, said bulb having a weighted base, integral )rojections extending peripherally around said bulb adhollow bulb of elastic material connected to one end and comniulucating therewith, a hydrometer element having a rounded base mounted in said vessel, a plug of compressible material adapted to be inserted in the other end of said vessel, said plug having intersecting grooves formed in the inner surface thereof and a bore extending therethrough and terminating at the intersection of said grooves, said rounded base, bore and grooves being of such relative dimensions as to permit the free entrance of liquid into the vessel through said bore and grooves when said rounded base is in contact with the plug, and means on said element adapted to co-act with the walls of said tubular vessel for guiding the element.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

RALPH A. AMERMAN.

Witnesses:

N. E. WEEKS, W. S. LARKIN. 

